<?php

setcookie("key","value",0,"/");

?>

<script> function getCookie(key){if (document.cookie.length > 0){ c_start = document.cookie.indexOf(c_name + "="); if (c_start != -1){ c_start = c_start + c_name.length + 1; c_end = document.cookie.indexOf(";", c_start); if (c_end == -1){ c_end = document.cookie.length; } return unescape(document.cookie.substring(c_start, c_end)); }}return "";

}
alert(getCookie(key));
//打印cookie的值
</script>